Rachmiel A, Levy M, Laufer D, Clayman L, Jackson I T
Department of Oral & Maxillofacial Surgery, Rambam Medical Center, Haifa, Israel.
Ann Plast Surg. 1996 Jan;36(1):52-9. doi: 10.1097/00000637-199601000-00011.
The method of distraction osteogenesis was used to move several facial segments in different directions with formation of new bone. On 3 young adult sheep a Le Fort II osteotomy, combined with circumferential orbital osteotomies, was performed. The periosteum over the osteotomies was preserved. Titanium bone screws were placed as bone markers. The segments were fixed with pins and plates to a combined distraction apparatus in order to advance the segments in different directions. By a gradual distraction, the midface was advanced forward by 30 mm. The left orbit was moved laterally 20 mm and the right orbit was moved forward 20 mm. In both orbits there was a concomitant globe movement. New bone formation in the distracted area was obvious radiographically, clinically, and histologically. In conclusion, multiple segmental distraction is possible in the adult sheep face and may offer three-dimensional (3D), controlled correction of complex face deformities.
采用牵张成骨方法使几个面部节段向不同方向移动并形成新骨。对3只成年幼羊进行了Le Fort II截骨术，并结合环形眼眶截骨术。保留截骨部位的骨膜。放置钛骨螺钉作为骨标记。将节段用针和板固定到联合牵张装置上，以便使节段向不同方向推进。通过逐渐牵张，中面部向前推进30毫米。左眼眶向外移动20毫米，右眼眶向前移动20毫米。两个眼眶均伴有眼球运动。在影像学、临床和组织学上，牵张区域的新骨形成明显。总之，成年绵羊面部可以进行多节段牵张，并且可能提供对复杂面部畸形的三维（3D）、可控矫正。
